Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/34—Trocars; Puncturing needles
  • A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/46—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for controlling depth of insertion
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
  • A61B90/06—Measuring instruments not otherwise provided for
  • A61B2090/062—Measuring instruments not otherwise provided for penetration depth

Definitions

• the invention relates to a device for injection into or for puncturing joint cavities, with a hollow cannula which can be inserted into the joint cavity and which is connected to an injection or puncture syringe.
• this aid is intended to prevent the cartilage or bones delimiting the joint cavity from being injured by a too deep insertion.
• the invention relates to a device for injection into or for puncturing joint cavities, with a hollow cannula which can be inserted into the joint cavity and which is connected to an injection or puncture syringe, this device being characterized in that the syringe in is displaceably mounted in the support direction in a support device which can be supported on the body surface of the patient in the area of the puncture site and in the area of the support surface has the ultrasound measuring head of a sonar measuring device which generates a control signal corresponding to the permissible penetration depth which controls a device assigned to the support device for limiting the penetration depth.
• the device according to the invention uses a diagnostic method that has been tried and tested many times in medical practice, namely sonography, for automatically limiting the penetration depth when a hollow cannula is inserted into a joint cavity.
• the ultrasound generated by the ultrasound measuring head of the sonar measuring device is reflected at the cartilage boundary or at the bone boundary.
• the reflection signal is picked up by the ultrasound measuring head, evaluated to determine the distance and converted into a control signal which is one of the Control device associated device for limiting the penetration depth controls.
• a control signal which is one of the Control device associated device for limiting the penetration depth controls.
• the sonar measuring device additionally generates a signal that locates the optimal puncture site.
• the sonar measuring device is also used to reliably find the joint gap required for the insertion of the hollow cannula.
• the sonar measuring device is expediently connected to a display on which the permissible puncture depth and / or the optimal puncture site can be represented digitally and / or as an image.
• a display makes it easier for the attending physician to obtain precise information about the permissible puncture depth and / or the optimum puncture site, without being primarily dependent on experience and tact.
• the ultrasound measuring head is expediently provided with a passage for the hollow cannula. This makes it possible to place the ultrasound measuring head in the immediate vicinity of the hollow cannula to be pierced. This has the particular advantage that the measuring direction of the ultrasonic measuring head corresponds almost exactly to the puncturing direction of the hollow cannula.
• the support device expediently has a transparent grip sleeve surrounding the hollow cannula above the ultrasonic measuring cup. This grip sleeve makes it easier for the attending physician to grip and guide the device safely and to observe the hollow cannula during the piercing process.
• a particularly preferred embodiment of the device according to the invention provides that the support device is provided with a motor-driven feed device for the displaceably mounted syringe, the feed path of this feed device being controlled by the control signal of the sonar measuring device is.
• the support device is designated in its entirety by reference number 1.
• the support device 1 has an elongated, hollow support body 2, the cavity of which also serves as a conduit for the electrical signal and power lines.
• the support beam 2 is provided at its lower end with an ultrasound measuring head 3, which can be placed on the patient's body surface 4 above a joint gap 5.
• the ultrasound measuring head 3 is connected to a sonar measuring device 6 via cables running through the cavity of the support beam 2.
• This sonar Measuring device 6 is at the same time connected to a display 7 which serves for the digital or visual display of the data determined and evaluated by the sonar measuring device 6.
• the support bracket 2 is connected to a fixed guide ring 8, in which a replaceable disposable syringe 9 is mounted in a vertically displaceable manner.
• the disposable syringe 9 is provided at the lower end with a hollow cannula 10, which can be designed either as an injection cannula or as a puncture cannula.
• the hollow cannula 10 runs through a passage channel 11 located in the middle of the ultrasound measuring head 3 in such a way that it can emerge below the ultrasound measuring head in order to penetrate into the joint gap 5.
• a movable syringe holder 12 which is immovable with the disposable syringe, is used to move the disposable syringe in the puncture direction of the hollow cannula 10
• a push rod 13 which is driven by a drive motor 14, which in turn is attached to the support bracket 2, serves to move the movable syringe holder 12 on the support bracket 2.
• the motor 14 is controlled by the sonar measuring device 6 so that the advance of the disposable syringe 9 and thus the hollow cannula
• the support bracket 2 above the ultrasound measuring head 3 is provided with a transparent grip sleeve 15 which surrounds the hollow cannula 10.
• the ultrasound measuring device not only determines the maximum permissible penetration depth, but also determines the exact position of the joint gap 5. This location of the joint gap 5 is likewise shown digitally or by an image on the display 7.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Heart & Thoracic Surgery (AREA)
• Animal Behavior & Ethology (AREA)
• Surgery (AREA)
• Veterinary Medicine (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Anesthesiology (AREA)
• Public Health (AREA)
• General Health & Medical Sciences (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Molecular Biology (AREA)
• Medical Informatics (AREA)
• Pathology (AREA)
• Vascular Medicine (AREA)
• Hematology (AREA)
• Ultra Sonic Daignosis Equipment (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6448035

Family Applications (1)

Country Status (2)

Cited By (33)

Families Citing this family (5)

Citations (5)

Family Cites Families (2)

• 1991
  • 1991-12-23 DE DE4142795A patent/DE4142795C1/de not_active Expired - Fee Related
• 1992
  • 1992-12-21 WO PCT/EP1992/002963 patent/WO1993012726A1/de active Application Filing

Patent Citations (5)

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